The term "Equalizer" is just what it means. It is supposed to divide the hitch weight between three axles. If you had a hitch weight of 500 lbs. it would transfer 150 lbs. to the rear axle of the tow vehicle, 100 lbs. to the front axle and 250 lbs. to the trailer axles. You may have more or less hitch weight, but these #'s give you a working formula. These settings are achieved by adjusting chain hook up length and ball height. Also bars come in different "weights". Heavy or lighter depending on the hitch weight. Have fun. Arnie